New windowing system

Large commit that totally refactor of the way we handle the bar and
panels.

Testing should focus on Panels, Bar, Keyboard Focus, IPC calls.

Changes brief:
- One NFullScreenWindow per screen which handle it's bar and dedicated
panels.
- Added shadows
- Reintroduced dimming
- New panels animations
- Proper Z ordering
- Panels on overlay laywer is not reimplemented, if we do it then the
bar will be on the Overlay too
- Panel dragging was not reimplemented, to be discussed before
reimplementing
- Still a WIP, need to work more on shadows and polishing + debugging.

Modules/ControlCenter/Cards/ShortcutsCard.qml

@@ -28,10 +28,13 @@ RowLayout {
       Repeater {
         model: Settings.data.controlCenter.shortcuts.left
         delegate: ControlCenterWidgetLoader {
+          required property var modelData
+          required property int index
+
           Layout.fillWidth: false
           widgetId: (modelData.id !== undefined ? modelData.id : "")
+          widgetScreen: root.screen
           widgetProps: {
-            "screen": root.modelData || null,
             "widgetId": modelData.id,
             "section": "quickSettings",
             "sectionWidgetIndex": index,
@@ -63,10 +66,13 @@ RowLayout {
       Repeater {
         model: Settings.data.controlCenter.shortcuts.right
         delegate: ControlCenterWidgetLoader {
+          required property var modelData
+          required property int index
+
           Layout.fillWidth: false
           widgetId: (modelData.id !== undefined ? modelData.id : "")
+          widgetScreen: root.screen
           widgetProps: {
-            "screen": root.modelData || null,
             "widgetId": modelData.id,
             "section": "quickSettings",
             "sectionWidgetIndex": index,